도전2022
기아 리오의 MDPS 본문
https://www.krioyb.com/motor_driven_power_steering-552.html
Kia Rio: Steering System / Motor Driven Power Steering
Description and operation
| Description |
MDPS (Motor Driven Power Steering) system uses an electric motor to assist the steering force and it is an engine operation independent steering system.
MDPS control module controls the motor operation according to information received from the each sensor and CAN (Controller Area Network),
Resulting in a more precise and timely control of steering assist than conventional engine-driven hydraulic systems. Components (Steering Angle Sensor, Torque Sensor, Fail-safe relay, etc.) of the MDPS system are located inside the steering column. MDPS unit assembly, steering column, and MDPS unit assembly must not be disassembled for inspection. They must be replaced if necessary.
Components and components location
| Components |
| 1. Steering column 2. Joint assembly |
3. MDPS motor 4. MDPS ECU |
Schematic diagrams
| Schematic Diagrams |
| Harness Connector |
| Type | Pin No | Description |
| Battery | 1 | Battery + |
| 2 | Battery - | |
| VSS | 1 | IGN |
| 2 | - | |
| 3 | - | |
| 4 | - | |
| 5 | - | |
| 6 | - | |
| 7 | HIGH CAN | |
| 8 | LOW CAN |
Repair procedures
| A/S Repair produres |
MDPS System A/S Workflow
① Noise / malfunction Inspection
② Warning lamp (DTC) / CAN Line error
2 - 1 Checking Connectors and Wiring
| 1. | Checking Connectors and Wiring. Check for damage, push-back, or improper connection in each connector and wiring. |
2 - 2 Inspection Items per DTC
| DTC | Problem | First analysis method | How to repair |
| C1290 | Torque sensor signal error | First erase DTC, check connector connection. | In case of reoccurrence, replace column & housing. |
| C1112 | Torque sensor voltage error | Check connector between torque sensor and ECU. | In case of reoccurrence, replace ECU. |
| C1705 | ECU hardware error | First erase DTC and then check, check ECU connector. | |
| C1604 | ECU over/discharge error | ||
| C2413 | ECU hardware error | ||
| C2400 | Motor signal error | IIn case of reoccurrence, replace motor. | |
| C2401 | Motor circuit error | ||
| C2412 | Motor voltage supply error | First erase DTC and check, Check ECU/motor connector. | First replace ECU. In case of reoccurrence, replace motor. |
| C1259 | Angle sensor signal error | After Resetting zero point & erasing DTC, check connector connection condition. | In case of reoccurrence, replace column & Housing. |
| C1261 | Zero-setting error | After Resetting zero point, recheck. | Reset the zero-setting. |
| C1102 | Battery voltage problem | Check battery voltage condition. | Recharge battery voltage. |
| C1696,C1697 | SPAS signal error | Check SPAS. | Erase DTC (MDPS is not to be replaced). |
| C1612,C1646 | TCU signal error | Check TCU. | |
| C1628,C1656 | Instrument cluster signal error | Check instrument cluster. | |
| C1692,C1693 | VSM signal error | Check VSM. | |
| C1260 | Angle sensor signal error | After resetting the angle, recheck. If C1259 does not occur, check CAN line. | Reset Angle sensor. Erase DTC. |
| C1611 | CAN time out EMS | 1. Check G-SCAN condition. 2. Check connector connection. 3. Check ECU CAN line. 4. Check MDPS ground line. |
Check the EMS CAN Line. |
| C1616 | CAN BUS OFF | Check the chassis CAN Line. | |
| C1622 | Vehicle speed signal error | Check the EMS (Engine ECU). | |
| C1623,C1687,C1688 | Can time out Steering angle sensor | 1. Check MDPS Power Connector & FUSE 2. Check MDPS Ground line 3. Check MDPS ECU / VSM CAN line 4. Communication status with GDS/KDS |
In case of reoccurrence, replace ECU (Heavy steering and no communication) |
③ MDPS Performance Inspection
| 1. | Inspect steering angle and DTCs relevant to the steering system. |
| 2. | Inspection for heavy steering effort |
④ MDPS common problems
| Case 1 | Case 2 | Case 3 |
| Multifunction switch noise | Clock spring noise | DAB / Wire noise |
| Replace multifunction switch | Replace clock spring | Rearrange and replace DAB |
| Case 4 | Case 5 | Case 6 |
| Multifunction switch noise | MB nut mount defect | M10 nut mount defect |
| Replace multifunction switch | Retighten nut | Retighten nut |
| Case 7 | Case 8 |
| Cowl top bolt mount defect | Cowl bar nut mount defect |
| Retighten cowl top bolt | Replace clock spring |
| Cautions to be taken when handling the MDPS (Motor Driven Power Steering) |
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